Complexity at the Fundamental Level:. Consequences for Lhc

This lecture ‐ delivered at the 2006 Erice School ‐ is closely linked to the one delivered in 2004, where the existence of Complexity at the fundamental level has been fully discussed. Here the consequences of Complexity for LHC are treated and the QGCW Project is presented. The references have been updated since the final edition of the lecture ‐ also presented at the 2007 Erice School ‐ has been printed on March 2008. If complexity exists at the fundamental level the expectations must fall outside all possible predictions. The QGCW should be the source for totally unexpected phenomena

EPS Roots & Future

Abstract not available

Supergravity and Superstring Signatures of the One-Parameter Model at LHC

Many string constructions have a classical no-scale structure, resulting in a one-parameter model (OPM) for the supersymmetry breaking soft terms. As a highly constrained subset of mSUGRA, the OPM has the potential to be predictive. Conversely, if the observed superpartner spectrum at LHC is a subset of the OPM parameter space, then this may provide a clue to the underlying theory at high energies. We investigate the allowed supersymmetry parameter space for a generic one-parameter model taking into account the most recent experimental constraints. We find that in the strict moduli scenario, there are no regions of the parameter space which may satisfy all constraints. However, for the dilaton scenario, there are small regions of the parameter space where all constraints may be satisfied and for which the observed dark matter density may be generated. We also survey the possible signatures which may be observable at the Large Hadron Collider (LHC). Finally, we compare collider signatures of OPM to those from a model with non-universal soft terms, in particular those of an intersecting D6-brane model. We find that it may be possible to distinguish between these diverse scenarios at LHC.Comment: 25 pages, 10 figures, accepted for publication in PR

The gaseous pixel device

The Gaseous Pixel Chamber is a new device developed during the last year within the LAA project at CERN. Basically we print electrodes onto a flexible Kapton foil with standard printed circuit technology used in the CERN workshops. We have found a design which allows us to operate the foil as a particle detector working in the gaseous limited streamer mode. This work has been previously reported. We are well satisfied with the operational characteristics that this device has reached so far (efficiency, ease to build and to operate). However, the demands imposed on any detector device at future hadron colliders are very stringent. There are still many possible improvements needed to meet the technical challenge for a device to work at the LHC,SSC or Eloisatron hadron collider (such as time response, space resolution, energy proportionality). Therefore we propose an R&D programme for studying the aspects that are relevant for application of this kind of detector within a hadron collider environment

Time-Shift in the OPERA set-up: proof against superluminal neutrinos without the need of knowing the CERN-LNGS distance and Reminiscences on the origin of the Gran Sasso Lab, of the 3rd neutrino and of the "Teramo Anomaly"

The LVD time stability allows to establish a time-shift in the OPERA experiment, thus providing the first proof against Superluminal neutrinos, using the horizontal muons of the "Teramo Anomaly". This proof is particularly interesting since does not need the knowledge of the distance between the place where the neutrinos are produced (CERN) and the place where they are detected (LNGS). Since the Superluminal neutrinos generated in the physics community a vivid interest in good and bad behaviour in physics research, the author thought it was appropriate to recall the origin of the Gran Sasso Lab, of the 3rd neutrino, of the horizontal muons due to the "Teramo Anomaly" and of the oscillation between leptonic flavours, when the CERN-Gran Sasso neutrino beam was included in the project for the most powerful underground Laboratory in the world.Comment: 35 pages, 25 Figures, Invited paper at the Gran Sasso mini-Workshop on LNGS results on the neutrino velocity topic, Gran Sasso, Italy, 28 March 201

A new type of resistive plate chamber: the multigap RPC

This paper describes the multigap resistive plate chamber (RPC). The goal is to obtain a much improved time resolution, keeping the advantages of the wide gap RPC in comparison with the conventional narrow gap RPC (smaller dynamic range and thus lower charge per avalanche which gives higher rate capability and lower power dissipation in the gas gap)